package cn.lokei.gateway.entity.kafka;

import com.alibaba.fastjson.JSONObject;

import org.springframework.beans.BeansException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.kafka.support.SendResult;
import org.springframework.stereotype.Component;
import org.springframework.util.concurrent.ListenableFuture;
import org.springframework.util.concurrent.ListenableFutureCallback;

import lombok.extern.slf4j.Slf4j;

@Component
@Slf4j
public class KafkaProducer implements ApplicationContextAware {

  private static ApplicationContext applicationContext; // Spring应用上下文环境

  @Autowired
  private KafkaTemplate<String, Object> kafkaTemplate;

  // 自定义topic
  public static final String TOPIC_TEST = "topic.navlange";

  //
  public static final String TOPIC_GROUP1 = "topic.group1";

  //
  public static final String TOPIC_GROUP2 = "topic.group2";

  /*
   * 实现了ApplicationContextAware 接口，必须实现该方法；
   * 通过传递applicationContext参数初始化成员变量applicationContext
   */
  @Override
  public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
    KafkaProducer.applicationContext = applicationContext;
  }

  public static ApplicationContext getApplicationContext() {
    return applicationContext;
  }

  @SuppressWarnings("unchecked")
  public static <T> T getBean(String name) throws BeansException {
    return (T) applicationContext.getBean(name);
  }

  public static <T> T getBean(Class<T> clazz) throws BeansException {
    return (T) applicationContext.getBean(clazz);
  }

  public void send(Object obj) {
    String obj2String = JSONObject.toJSONString(obj);
    log.info("准备发送消息为：{}", obj2String);
    // 发送消息
    try {
      ListenableFuture<SendResult<String, Object>> future = kafkaTemplate.send(TOPIC_TEST, "hello kafka");
      future.addCallback(new ListenableFutureCallback<SendResult<String, Object>>() {
        @Override
        public void onFailure(Throwable throwable) {
          // 发送失败的处理
          log.info(TOPIC_TEST + " - 生产者 发送消息失败：" + throwable.getMessage());
        }

        @Override
        public void onSuccess(SendResult<String, Object> stringObjectSendResult) {
          // 成功的处理
          log.info(TOPIC_TEST + " - 生产者 发送消息成功：" + stringObjectSendResult.toString());
        }
      });
    } catch (Exception e) {
      log.info(e.toString());
    }

  }
}